APA (7th ed.) Citation

O'Connor, H. (1963). World crisis in oil / by H. O'Connor. Elek Books.

Chicago Style (17th ed.) Citation

O'Connor, H. World Crisis in Oil / by H. O'Connor. Elek Books, 1963.

MLA (9th ed.) Citation

O'Connor, H. World Crisis in Oil / by H. O'Connor. Elek Books, 1963.

Warning: These citations may not always be 100% accurate.